Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a first shell, a battery cell assembly, a sealing part and a filling part, the first shell is provided with a first space and a first opening, and the first opening is communicated with the first space. The battery cell assembly comprises a battery cell and a first connecting piece, the battery cell is connected with the first connecting piece, the battery cell is arranged in the first space, the first connecting piece penetrates through the first opening and extends out of the first shell, and the first connecting piece is used for being connected with other devices. The sealing piece is connected with the first shell, a second space and a first hole communicated with the second space are defined by the sealing piece and the first shell, part of the first connecting piece is located in the second space, and the first connecting piece extends out of the second space from the first hole. And at least part of the filling piece is arranged in a gap between the sealing piece and the first connecting piece. And the possibility that water or dirt enters the first space is reduced, so that the possibility that the battery cells are damaged due to damp or dirt is reduced, and the durability of the battery pack is improved.

Description

Technical Field

[0001] The present application belongs to the field of energy storage technology, and in particular relates to a battery pack and electrical equipment. Background Art

[0002] At present, when the battery cell of the battery pack needs to be connected to other devices, a connector needs to be led out from the battery cell, and the connector passes through an opening on the shell of the battery pack to connect to other devices. At this time, moisture or dirt can easily enter the shell through the opening on the shell, causing the battery cell to be damp or contaminated and damaged. Utility Model Content

[0003] In view of the above situation, it is necessary to provide a battery pack that is conducive to sealing the opening through which the connector passes.

[0004] An embodiment of the present application provides a battery pack, including a first shell, a battery cell assembly, a sealing member and a filling member. The first shell has a first space, and the first shell is provided with a first opening, and the first opening is connected to the first space. The battery cell assembly includes a battery cell and a first connecting member, the battery cell is connected to the first connecting member, the battery cell is arranged in the first space, the first connecting member is passed through the first opening and extends out of the first shell, and the first connecting member is used to connect other devices. The sealing member is connected to the first shell, and encloses a second space and a first hole with the first shell, a portion of the first connecting member is located in the second space, and the first connecting member extends out of the first hole into the second space. The filling member is at least partially arranged in the gap between the sealing member and the first connecting member.

[0005] In this battery pack, the seal and the first shell enclose a second space and a first hole to accommodate a filler, which helps to reduce the possibility of moisture or dirt entering the first space, thereby reducing the possibility of damage to the battery cell due to moisture or dirt, and improving the durability of the battery pack.

[0006] In one or more optional embodiments above, the first housing includes a recessed portion, the recessed portion is located outside the first space, the sealing member and the filling member are both disposed in the recessed portion, and the recessed portion accommodates at least part of other devices, which is beneficial to improving the compactness of the battery pack.

[0007] In one or more of the above optional embodiments, the battery pack includes a second shell and an electronic device disposed in the recess, the first connector is connected to the electronic device, the recess and the second shell are enclosed to form a third space, and part of the first connector and the electronic device are disposed in the third space. On the one hand, it is beneficial to improve the compactness of the connection between the electronic device and the first shell, and on the other hand, the second shell has a protective effect on the electronic device, which is beneficial to improve the service life of the electronic device.

[0008] In one or more optional embodiments of the above battery pack, the first shell includes a top wall and a bottom wall arranged opposite to each other along a first direction, and a first side wall and a second side wall arranged opposite to each other along a second direction, and the first direction is perpendicular to the second direction. The first shell includes an inclined portion, the inclined portion connects the top wall and the first side wall, the first opening passes through the inclined portion, and the sealing member and the filling member are arranged on the inclined portion. By providing the inclined portion, it is beneficial to guide the liquid entering the recess and reduce the possibility of moisture entering the second space.

[0009] In one or more optional embodiments above, the first housing includes a third side wall and a fourth side wall arranged opposite to each other along a third direction, the inclined portion connects the third side wall and the fourth side wall, and the inclined portion, a portion of the third side wall, a portion of the fourth side wall, a portion of the first side wall, and a portion of the top wall form a recessed portion, which is beneficial for reducing the occupation of the first space by the recessed portion and improving the space utilization of the battery pack.

[0010] In one or more optional embodiments above, the seal comprises a main body and a blocking portion extending from the main body, the blocking portion forms a second opening, the inclined portion covers the second opening, the main body and the inclined portion are spaced apart, the inclined portion, the blocking portion and the main body form a first hole, or the inclined portion and the blocking portion form the first hole. The seal has a simple structure, which is conducive to reducing production costs.

[0011] In one or more of the above optional embodiments, the filling piece is configured to be formed by placing an insulating material in the second space and then solidifying it, which is beneficial to improving the waterproof effect of the filling piece.

[0012] In one or more of the above optional embodiments, the filling member closes the first hole, which is helpful to reduce the possibility of moisture entering the second space through the first hole.

[0013] In one or more optional embodiments above, the battery pack includes an insulating member disposed at the first opening, the insulating member is provided with a second through hole, the first connector includes a first wire, and the first wire is clamped in the second through hole, which is beneficial to further reduce the possibility of moisture entering the first space.

[0014] The embodiment of the present application also provides an electric device, comprising the battery pack involved in any of the above embodiments. The use of this battery pack is conducive to improving the durability of the electric device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a battery pack in one embodiment of the present application.

[0016] Figure 2 It is a cross-sectional view of a partial structure of a battery pack in one embodiment of the present application.

[0017] Figure 3It is a schematic diagram of the structural decomposition of a battery pack in one embodiment of the present application.

[0018] Figure 4 It is a schematic diagram of the partial structure of a battery pack in one embodiment of the present application.

[0019] Figure 5 It is a schematic diagram of the structure of a battery cell in one embodiment of the present application.

[0020] Figure 6 It is a schematic diagram of the partial structure of a battery pack in one embodiment of the present application.

[0021] Figure 7 It is a schematic diagram of the partial structure of a battery pack in one embodiment of the present application.

[0022] Figure 8 It is a schematic diagram of the structure of a sealing member in one embodiment of the present application.

[0023] Fig. 9 It is a schematic structural diagram of a sealing member in another embodiment of the present application.

[0024] Fig.10 It is a schematic diagram of the structure of an insulating member in an embodiment of the present application.

[0025] Fig.11 It is a schematic diagram of the structure of an electrical device in an embodiment of the present application.

[0026] Reference numerals

[0027] Battery Pack 100

[0028] First housing 10

[0029] First space 10a

[0030] First opening 10b

[0031] Third Space 10c

[0032] Top wall 11

[0033] Bottom wall 12

[0034] First side wall 13

[0035] First through hole 131

[0036] Second side wall 14

[0037] The third side wall 15

[0038] Fourth side wall 16

[0039] Inclined portion 17

[0040] Recess 18

[0041] First sub-housing 101

[0042] Second sub-housing 102

[0043] Battery cell assembly 20

[0044] Battery 21

[0045] Battery shell 211

[0046] Electrode terminal 212

[0047] First connecting member 22

[0048] First wire 221

[0049] First joint 222

[0050] Circuit board 23

[0051] Seal 30

[0052] Main body 31

[0053] Enclosure 32

[0054] The second opening 321

[0055] Second space 30a

[0056] First hole 30b

[0057] Insulation 40

[0058] The second through hole 41

[0059] Filler 50

[0060] Other devices 60

[0061] Electronic devices 61

[0062] Second housing 70

[0063] Electrical equipment 1000

[0064] First direction X

[0065] Second direction Y

[0066] The third direction Z

[0067] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0068] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0069] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a centrally arranged element at the same time. When an element is considered to be "set" on another element, it can be directly set on the other element or there may be a centrally arranged element at the same time. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0071] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0072] In the description of the embodiments of the present application, the term "perpendicular" is used to describe an ideal state between two components. In actual production or use, there may be a state that is approximately perpendicular between the two components. The two components described as "perpendicular" may not be absolutely straight lines or planes, but may be roughly straight lines or planes. From a macroscopic point of view, if the overall extension direction is a straight line or a plane, the components can be considered to be "straight lines" or "planes".

[0073] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. The various embodiments in the present application may be combined with each other in the absence of conflict.

[0074] When the battery cell of the battery pack needs to be connected to other devices, a connector needs to be led out from the battery cell, and the connector passes through the opening on the first shell of the battery pack to connect to other devices. At this time, moisture or dirt can easily enter the first shell through the opening on the first shell, causing the battery cell to be damp or contaminated and damaged.

[0075] In view of this, an embodiment of the present application provides a battery pack, including a first shell, a battery cell assembly, a sealing member and a filling member. The first shell has a first space, and the first shell is provided with a first opening, and the first opening is connected to the first space. The battery cell assembly includes a battery cell and a first connector, the battery cell is connected to the first connector, the battery cell is arranged in the first space, the first connector passes through the first opening and extends out of the first shell, and the first connector is used to connect other devices. The sealing member is connected to the first shell, and encloses a second space and a first hole with the first shell, a portion of the first connector is located in the second space, the first connector extends from the first hole into the second space, and the filling member is at least partially arranged in the gap between the sealing member and the first connector.

[0076] In this battery pack, the seal and the first shell enclose a second space and a first hole to accommodate a filling piece. The filling piece closes the first hole, which helps to reduce the possibility of moisture or dirt entering the first space, thereby reducing the possibility of damage to the battery cell due to moisture or contamination and improving the durability of the battery pack.

[0077] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0078] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a battery pack 100, including a first shell 10 and a battery cell assembly 20. The first shell 10 has a first space 10a, and the first shell 10 is provided with a first opening 10b. The battery cell assembly 20 includes a battery cell 21 and a first connector 22, the battery cell 21 is connected to the first connector 22, the battery cell 21 is arranged in the first space 10a, the first connector 22 passes through the first opening 10b, and extends out of the first shell 10, and the first connector 22 is used to connect other devices 60. Among them, the other device 60 can be the electronic device 61 involved later, or it can be other devices independent of the battery pack 100, such as an energy consumption device or a charging device.

[0079] In some embodiments, Figure 2 and Figure 3 As shown, the first housing 10 includes a recess 18, which is located outside the first space 10a, and the sealing member 30 and the filling member 50 are both disposed in the recess 18, which accommodates at least part of the other device 60. This is beneficial to improving the compactness of the battery pack 100.

[0080] In some embodiments, Figure 2 and Figure 3 As shown, the battery pack 100 includes a second housing 70 and an electronic device 61 disposed in the recess 18, the first connector 22 is connected to the electronic device 61, the recess 18 and the second housing 70 enclose a third space 10c, and a portion of the first connector 22 and the electronic device 61 are disposed in the third space 10c. On the one hand, it is beneficial to improve the compactness of the connection between the electronic device 61 and the first housing 10, and on the other hand, the second housing 70 has a protective effect on the electronic device 61, which is beneficial to improve the service life of the electronic device 61.

[0081] In some embodiments, the electronic device 40 includes a DC-DC voltage converter (DCDC). The DC-DC voltage converter (DCDC) converts the voltage output by the battery pack 100 so that the battery pack 100 provides at least two different voltages to the outside to provide electrical appliances with different rated voltages. For example, the rated voltage of the battery pack 100 is A1V, and the DC-DC voltage converter (DCDC) converts the voltage output by the battery pack 100 from A1V to A2V. The battery pack 100 provides two different voltages, A1 and A2, to the electrical appliances through the connector 90.

[0082] In some embodiments, Figure 5 As shown, the battery cell 21 includes a battery cell housing 211 , an electrode assembly (not shown) and an electrode terminal 212 . The electrode assembly is disposed in the battery cell housing 211 . The electrode terminal 212 is connected to the electrode assembly and exposed from the battery cell housing 211 .

[0083] In some embodiments, the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive electrode sheet and the negative electrode sheet.

[0084] In some embodiments, the positive electrode sheet, the separator, and the negative electrode sheet are stacked and then wound to form a wound structure.

[0085] In some embodiments, a plurality of positive electrode sheets, a plurality of separators, and a plurality of negative electrode sheets are stacked to form a stacked structure.

[0086] In some embodiments, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer disposed on the positive electrode current collector, and the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector.

[0087] In some embodiments, both the positive electrode current collector and the negative electrode current collector are metal layers. As an illustrative example, the positive electrode current collector may be a metal layer including at least one of aluminum, nickel, tantalum, and titanium, such as aluminum foil. The negative electrode current collector may be a metal layer including at least one of copper, nickel, tantalum, and titanium, such as copper foil.

[0088] In some embodiments, the positive electrode active material layer includes a positive electrode active material, and as an exemplary example, the positive electrode active material includes at least one of lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium iron phosphate, lithium manganese iron phosphate, or lithium manganese oxide. The negative electrode active material layer includes a negative electrode active material, and as an exemplary example, the negative electrode active material includes at least one of graphite, hard carbon, soft carbon, silicon, silicon-oxygen material, and silicon-carbon material.

[0089] In some embodiments, the isolation film is an insulating film material such as a polyethylene film, a polypropylene film, a polyester film or a polyimide film to isolate the positive electrode sheet from the negative electrode sheet.

[0090] In some embodiments, Figure 3 As shown, the battery cell assembly 20 includes a circuit board 23 , the circuit board 23 is connected to the battery cell 21 , and the first connecting member 22 is connected to the circuit board 23 .

[0091] In some embodiments, Figure 3 and Figure 4 As shown, the battery assembly includes a seal 30 and a filler 50. The seal 30 is connected to the first shell 10 and encloses a second space 30a and a first hole 30b with the first shell 10. Part of the first connector 22 is located in the second space 30a. The first connector 22 extends from the first hole 30b to the second space 30a to connect with the electronic device 61. At least part of the filler 50 is arranged in the gap between the seal 30 and the first connector 22, which is conducive to reducing the possibility of moisture or dirt entering the first space 10a, thereby reducing the possibility of damage to the battery cell 21 due to moisture or dirt, and improving the durability of the battery pack 100.

[0092] In some embodiments, before the filling member 50 is provided, the second space 30 a connects the first hole 30 b and the first opening 10 b , which is beneficial to the assembly of the first connecting member 22 .

[0093] In some embodiments, the sealing member 30 is made of foam.

[0094] In some embodiments, Figure 4 , Figure 8 and Fig. 9 As shown, the seal 30 includes a main body 31 and a blocking portion 32 extending from the main body 31, the blocking portion 32 forms a second opening 321, the inclined portion 17 covers the second opening 321, and the main body 31 and the inclined portion 17 are arranged at intervals. The seal 30 includes two parts, has a simple structure, and is conducive to reducing production costs.

[0095] In some embodiments, Figure 4 and Figure 8 As shown, the inclined portion 17 , the surrounding portion 32 and the main body portion 31 form a first hole 30 b.

[0096] In some embodiments, Fig. 9 As shown, the inclined portion 17 and the surrounding portion 32 form a first hole 30b.

[0097] In some embodiments, the filler 50 includes one or more of resin, rubber, and silicone.

[0098] In some embodiments, the filling member 50 is configured to be formed by placing an insulating material in the second space 30 a and then curing the insulating material, which is beneficial to improving the waterproof effect of the filling member 50 .

[0099] In some embodiments, the insulating material includes, but is not limited to, potting glue, foaming glue, and structural glue.

[0100] In some embodiments, the filling member 50 closes the first hole 30 b , which helps to reduce the possibility of moisture entering the second space 30 a through the first hole 30 b .

[0101] In some embodiments, the filling member 50 extends to the outside of the first hole 30 b , which helps to further reduce the possibility of moisture entering the second space 30 a .

[0102] In some embodiments, Figure 3 As shown, the first housing 10 is provided with a first through hole 131, and the first through hole 131 communicates the internal space of the recess 18 with the external environment of the first housing 10. The first through hole 131 is provided to facilitate the removal of moisture accumulated in the recess 18, reduce the possibility of moisture entering the first space 10a, and thus reduce the possibility of the battery cell 21 being damaged by moisture.

[0103] In some embodiments, Figure 3 As shown, the first shell 10 includes a top wall 11 and a bottom wall 12 arranged opposite to each other along a first direction X, and a first side wall 13 and a second side wall 14 arranged opposite to each other along a second direction Y. The first side wall 13 and the second side wall 14 are both connected between the top wall 11 and the bottom wall 12. The first direction X is perpendicular to the second direction Y.

[0104] In some embodiments, the first housing 10 includes an inclined portion 17, the inclined portion 17 connects the top wall 11 and the first side wall 13, the first opening 10b passes through the inclined portion 17, and the sealing member 30 and the filling member 50 are arranged on the inclined portion 17. The inclined portion 17 is provided to facilitate the diversion of the liquid entering the recess 18, and facilitate the concentration of the water toward the bottom of the inclined portion 17, that is, toward the direction of the first side wall 13, thereby reducing the possibility of water entering the second space 30a.

[0105] In some implementations, such as Figure 3As shown, the first through hole 131 is opened in the first side wall 13. This is conducive to draining the moisture collected at the bottom of the inclined portion 17 from the first through hole 131, reducing the possibility of moisture accumulation in the recess 18, thereby reducing the possibility of the battery cell 21 being damp.

[0106] In some embodiments, Figure 4 As shown, the first hole 30b faces the third direction Z, and the third direction Z is perpendicular to the first direction X and the second direction Y. In this way, the direction in which the water flows along the inclined portion 17 is perpendicular to the direction of the first hole 30b, which is conducive to reducing the possibility of water entering the second space 30a, thereby reducing the possibility of water entering the first space 10a.

[0107] In some embodiments, the first hole 30b faces the first side wall 13. Thus, the first hole 30b faces away from the water flowing along the inclined portion 17, which helps to reduce the possibility of water entering the second space 30a, thereby reducing the possibility of water entering the first space 10a.

[0108] In some embodiments, Figure 3 As shown, the first housing 10 includes a third side wall 15 and a fourth side wall 16 arranged opposite to each other along the third direction Z, an inclined portion 17 connects the third side wall 15 and the fourth side wall 16, and the inclined portion 17, a portion of the third side wall 15, a portion of the fourth side wall 16, a portion of the first side wall 13, and a portion of the top wall 11 form a recess 18. This is beneficial to reduce the occupation of the recess 18 in the first space 10a and improve the space utilization of the battery pack 100.

[0109] In some embodiments, Figure 3 As shown, the first housing 10 includes a first sub-housing 101 and a second sub-housing 102 , and the first sub-housing 101 is connected to the second sub-housing 102 to form a first space 10 a and a recess 18 .

[0110] In some embodiments, Figure 3 As shown, the first sub-shell 101 includes a third side wall 15, a portion of the top wall 11, a portion of the bottom wall 12, a portion of the first side wall 13, and a portion of the second side wall 14. The second sub-shell 102 includes a fourth side wall 16, a portion of the top wall 11, a portion of the bottom wall 12, a portion of the first side wall 13, and a portion of the second side wall 14.

[0111] In some embodiments, the first housing 10 is made of plastic material.

[0112] In some embodiments, Figure 3 As shown, the first connecting member 22 includes a first wire 221 , and the first wire 221 is used to connect the battery cell 21 and other devices 60 .

[0113] In some embodiments, a plurality of first conductive lines 221 are provided.

[0114] In some embodiments, Figure 6 As shown, the first connector 22 includes a first connector 222, a first wire 221 connects the battery cell 21 and the first connector 222, the first connector 222 is located outside the second space 30a, and the first connector 222 is used to plug other devices 60. The first connector 222 can be connected to or removed from other devices 60 multiple times, which is conducive to repeated rapid connection or separation of the battery cell 21 and other devices 60.

[0115] In some embodiments, Figure 7 and Fig.10 As shown, the battery pack 100 includes an insulating member 40 disposed at the first opening 10b, the insulating member 40 is provided with a second through hole 41, and the first wire 221 is clamped in the second through hole 41, which is conducive to further reducing the possibility of moisture entering the first space 10a. In addition, when the filling member 50 is formed by solidification of the insulating material, the insulating member 40 is conducive to limiting the position of the first wire 221, reducing the possibility of the first wire 221 moving during the solidification process of the insulating material, and is conducive to improving the sealing effect of the filling member 50 on the first hole 30b.

[0116] like Fig.11 As shown, the embodiment of the present application further provides an electric device 1000, which includes the battery pack 100 involved in the above-mentioned embodiment. Since the battery pack 100 is conducive to reducing the possibility of moisture or dirt entering the first space 10a, thereby reducing the possibility of damage to the battery cell 21 due to moisture or dirt, and improving the durability of the battery pack 100, the use of the battery pack 100 is conducive to improving the durability of the electric device 1000.

[0117] In some embodiments, the electric device 1000 includes but is not limited to new energy vehicles, electric two-wheeled vehicles and drones.

[0118] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the disclosure scope of the present application.

Claims

1. A battery pack, characterized in that: include: A first shell has a first space, the first shell has a first opening, and the first opening is connected to the first space; A battery cell assembly, comprising a battery cell and a first connector, wherein the battery cell is connected to the first connector, the battery cell is disposed in the first space, the first connector passes through the first opening and extends out of the first shell, and the first connector is used to connect to other devices; a sealing member connected to the first shell and enclosed with the first shell to form a second space and a first hole, wherein a portion of the first connecting member is located in the second space, and the first connecting member extends from the first hole to the second space; The filling member is at least partially disposed in the gap between the sealing member and the first connecting member.

2. The battery pack according to claim 1, characterized in that: The first shell includes a recessed portion, the recessed portion is located outside the first space, the sealing member and the filling member are both arranged in the recessed portion, and the recessed portion accommodates at least a portion of the other device.

3. The battery pack according to claim 2, characterized in that: The battery pack includes a second shell and an electronic device disposed in the recess, the first connector is connected to the electronic device, the recess and the second shell are enclosed to form a third space, and part of the first connector and the electronic device are disposed in the third space.

4. The battery pack according to claim 2, characterized in that: The first housing comprises a top wall and a bottom wall arranged opposite to each other along a first direction, and a first side wall and a second side wall arranged opposite to each other along a second direction, wherein the first direction is perpendicular to the second direction; The first shell includes an inclined portion, the inclined portion connects the top wall and the first side wall, the first opening passes through the inclined portion, and the sealing member and the filling member are disposed on the inclined portion.

5. The battery pack according to claim 4, characterized in that: The first shell includes a third side wall and a fourth side wall arranged opposite to each other along a third direction, the inclined portion connects the third side wall and the fourth side wall, and the inclined portion, a portion of the third side wall, a portion of the fourth side wall, a portion of the first side wall, and a portion of the top wall form the recess.

6. The battery pack according to claim 5, characterized in that: The sealing member comprises a main body and a surrounding portion extending from the main body, the surrounding portion forms a second opening, and the inclined portion covers the second opening; The main body portion and the inclined portion are arranged at intervals; The inclined portion, the surrounding portion, and the main body form the first hole, or the inclined portion and the surrounding portion form the first hole.

7. The battery pack according to any one of claims 1 to 6, characterized in that: The filling member is configured to be formed by placing an insulating material in the second space and then curing the insulating material.

8. The battery pack according to claim 7, characterized in that: The filling member closes the first hole.

9. The battery pack according to claim 7, characterized in that: The battery pack includes an insulating member disposed at the first opening, wherein the insulating member is provided with a second through hole; The first connecting member includes a first conductive wire, and the first conductive wire is clamped in the second through hole.

10. An electrical device, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 9.

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